12564 Ikeller

12564 Ikeller
Discovery [1]
Discovered by W. Bickel
Discovery site Bergisch Gladbach Obs.
Discovery date 22 September 1998
Designations
MPC designation 12564 Ikeller
Named after
 Ingeborg Bickel–Keller
(discoverer's wife)[2]
1998 SO49 · 1988 RA7
1991 EG5 · 1993 SK13
main-belt · Koronis [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 26.84 yr (9,802 days)     
Aphelion 2.9399 AU
Perihelion 2.7273 AU
2.8336 AU
Eccentricity 0.0375
4.77 yr (1,742 days)
303.28°
0° 12m 23.76s / day
Inclination 1.6198°
180.04°
117.72°
Physical characteristics
Dimensions 5.369±0.259 km[4]
5.17 km (calculated)[3]
7.0423±0.0196 h (S)[5]
7.0321±0.0196 h (R)[5]
0.2225±0.0495[4]
0.24 (assumed)[3]
S [3]
13.6[1][3][4]
14.282±0.007 (S)[5]
13.644±0.003 (R)[5]
14.16±0.23[6]

    12564 Ikeller, provisional designation 1998 SO49, is a stony Koronis asteroid from the outer region of the asteroid belt, approximately 5 kilometers in diameter. It was discovered by German amateur astronomer Wolf Bickel at his private Bergisch Gladbach Observatory on 22 September 1998.[2]

    The S-type asteroid is a member of the Koronis family, which is named after 158 Koronis and consists of about 300 known bodies. It orbits the Sun at a distance of 2.7–2.9 AU once every 4 years and 9 months (1,742 days). Its orbit has a low eccentricity of 0.04 and a typically low inclination of 2° with respect to the ecliptic.[1]

    According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid measures 5.4 kilometers in diameter and its surface has an albedo of 0.22,[4] while the Collaborative Asteroid Lightcurve Link (CALL) assumes an albedo of 0.24 and thus calculates a smaller diameter of 5.2 kilometers, as the higher the albedo (reflectivity), the smaller the body's diameter at a constant absolute magnitude (brightness).[3] In August 2012, a photometric light-curve analysis at the U.S. Palomar Transient Factory, California, rendered a rotation period of 7.0423±0.0196 hours with a brightness amplitude of 0.44 in magnitude (U=2).[5]

    The minor planet was named by the discoverer after his wife, Ingeborg Bickel–Keller (b. 1941).[2]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 12564 Ikeller (1998 SO49)" (2015-07-12 last obs.). Jet Propulsion Laboratory. Retrieved April 2016.
    2. 1 2 3 "12564 Ikeller (1998 SO49)". Minor Planet Center. Retrieved April 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (12564) Ikeller". Asteroid Lightcurve Database (LCDB). Retrieved April 2016.
    4. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved April 2016.
    5. 1 2 3 4 5 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved April 2016.
    6. ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved April 2016.

    External links


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